EP 0190774 B1 19920708 - RECORD CARRIER BODY PROVIDED WITH PREFORMED OPTICALLY DETECTABLE SERVO-TRACK PORTIONS AND SECTOR ADDRESSES
Title (en)
RECORD CARRIER BODY PROVIDED WITH PREFORMED OPTICALLY DETECTABLE SERVO-TRACK PORTIONS AND SECTOR ADDRESSES
Publication
Application
Priority
NL 8500152 A 19850122
Abstract (en)
[origin: EP0190774A1] A record-carrier body is described, in which a user can record information by means of optical radiation, which record-carrier body has a relief structure of optically detectable servo-track portions (7) and sector addresses.(6) If the maximum width of the servo-track portions and the areas in the sector addresses is at least of the order of half the track period (P) the servo-track portions can be tracked in an optimum manner and the sector-address areas and the information areas recorded by the user provided a read signal of high amplitude.
IPC 1-7
IPC 8 full level
G11B 7/00 (2006.01); G11B 7/0045 (2006.01); G11B 7/007 (2006.01); G11B 7/09 (2006.01); G11B 7/12 (2006.01); G11B 7/135 (2006.01); G11B 7/14 (2012.01); G11B 7/18 (2006.01); G11B 7/24 (2006.01); G11B 23/00 (2006.01)
CPC (source: EP US)
G11B 7/00745 (2013.01 - EP US); G11B 7/0938 (2013.01 - EP US); G11B 7/12 (2013.01 - EP US); G11B 7/14 (2013.01 - EP US); G11B 7/24 (2013.01 - EP US); G11B 23/0057 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0190774 A1 19860813; EP 0190774 B1 19920708; DE 3685886 D1 19920813; DE 3685886 T2 19930218; JP H07118099 B2 19951218; JP S61172232 A 19860802; NL 8500152 A 19860818; US 4949330 A 19900814; US 5038339 A 19910806
DOCDB simple family (application)
EP 86200023 A 19860109; DE 3685886 T 19860109; JP 905286 A 19860121; NL 8500152 A 19850122; US 25736088 A 19881012; US 46769690 A 19900220